JPH0181720U - - Google Patents
Info
- Publication number
- JPH0181720U JPH0181720U JP1987176995U JP17699587U JPH0181720U JP H0181720 U JPH0181720 U JP H0181720U JP 1987176995 U JP1987176995 U JP 1987176995U JP 17699587 U JP17699587 U JP 17699587U JP H0181720 U JPH0181720 U JP H0181720U
- Authority
- JP
- Japan
- Prior art keywords
- circumferential wall
- laser beam
- center hole
- disposing
- absorbs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 description 4
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
第１図は本考案の一実施例の構造を示す一部欠
切断面図、第２図Ａ，Ｂは前記の実施例の中心部
の一部欠切断面図、第３図は前記の実施例の周辺
部の断面図、第４図は従来例の一部欠切断面図で
ある。
図中、１はコンパクトデイスク、２は中心穴、
６はレーザ光線、８は内周面、９は外周部、１０
は外周壁、１１は黒い色の材料を示す。
FIG. 1 is a partially cutaway sectional view showing the structure of one embodiment of the present invention, FIGS. 2A and B are partially cutaway sectional views of the central part of the embodiment described above, and FIG. A sectional view of the peripheral portion of the example, and FIG. 4 is a partially cutaway sectional view of the conventional example. In the figure, 1 is a compact disk, 2 is a center hole,
6 is a laser beam, 8 is an inner peripheral surface, 9 is an outer peripheral part, 10
indicates the outer peripheral wall, and 11 indicates a black material.
Claims (1)
周壁８及びまたは外縁９の外周壁１０の内側に、
レーザ光線６を吸収する材料１１を配設して成る
構造のコンパクトデイスク。 In the compact disc 1, inside the inner circumferential wall 8 of the center hole 2 and/or the outer circumferential wall 10 of the outer edge 9,
A compact disk constructed by disposing a material 11 that absorbs a laser beam 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987176995U JPH0181720U (en) | 1987-11-19 | 1987-11-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987176995U JPH0181720U (en) | 1987-11-19 | 1987-11-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0181720U true JPH0181720U (en) | 1989-05-31 |
Family
ID=31468684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987176995U Pending JPH0181720U (en) | 1987-11-19 | 1987-11-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0181720U (en) |
-
1987
- 1987-11-19 JP JP1987176995U patent/JPH0181720U/ja active Pending